Stephen 
Hello All, Looking for some help clarifying things concerning the booting sequence, role/operation regarding the 'Steppingstone' copying NAND flash to the 4K, etc. I know the post is long but I want to give the background to the results I'm seeing so hopefully you will see why I'm confused. Reading the S3C2440 User Manual, for NAND startup the device copies the first 4K from an external NAND flash and then begins executing the code. This 4K needs to be error free, since the ECC is not in effect, and it is implied the 4K needs to configure the RAM and copy the rest of the program/OS to external RAM and then the device should restart starting up on the program/OS in the external RAM. Is this the correct sequence? Why I'm asking/confused... Using Minitools I flashed the NAND with Superboot2400 and my own program (no OS, just and embedded program) and it wasn't working (no blinking LEDs). So using HJTAG and JTAG port I pulled the NAND contents and using IDA PRO I found the following at 0x00000000 0000 0000 DCD 0x140000EA 0000 0004 DCD 0x14F09FE5 0000 0008 DCD 0x14F09FE5 0000 000C DCD 0x14F09FE5 0000 0010 DCD 0x14F09FE5 0000 0014 DCD 0x14F09FE5 0000 0018 DCD 0x14F09FE5 0000 001C DCD 0x14F09FE5 0000 0020 ANDVS PC, R2, R3,LSR R8 0000 0020 ANDVS PC, R2, R3,LSR R8 0000 0020 ANDVS PC, R2, R3,LSR R8 0000 0020 ANDVS PC, R2, R3,LSR R8 0000 0020 ANDVS PC, R2, R3,LSR R8 0000 0020 ANDVS PC, R2, R3,LSR R8 0000 0020 ANDVS PC, R2, R3,LSR R8 0000 003C SVC 0xBEADDE and the listing goes on but I can NOT find my program anywhere in the listing. According to the manual, the first 8 memory locations are the exception vectors so when the device is reset the address at location 0x00000000 will be jumped to for execution to begin. However, the address at 0x00000000 in the listing above is in the ROM area of the device (per the memory map for NAND startup) so how is that supposed to work? Shouldn't it be pointing to 0x30000000 (Start of RAM area per the map?) Next question/confusion is about the Steppingstone copy/execute part- Superboot is more than 4K in size so does the device copy just 4K of Superboot into the steppingstone RAM, jump to 0x00000000(?) and then start executing? If so are the exception vectors not setup/used during the startup? Thanks in advance for any help/guidance and I'll be checking back frequently so if what I'm asking isn't making sense, please respond with your clarifying questions and I'll reply to those as well. S